edu.ucsb.nceas.dbadapter
Class PostgresqlAdapter

java.lang.Object
  |
  +--edu.ucsb.nceas.dbadapter.AbstractDatabase
        |
        +--edu.ucsb.nceas.dbadapter.PostgresqlAdapter

public class PostgresqlAdapter
extends AbstractDatabase

The PostgreSQL db adapter implementation.


Constructor Summary
PostgresqlAdapter()
           
 
Method Summary
 java.lang.String getDateTimeFunction()
          The PostgreSQL function name that gets the current date and time from the database server
 java.lang.String getIsNULLFunction()
          The PostgreSQL function name that is used to return non-NULL value
 java.lang.String getStringDelimiter()
          PostgreSQL's string delimiter character: single quote (')
 long getUniqueID(java.sql.Connection conn, java.lang.String tableName)
          The PostgreSQL unique ID /sequence generator The name of the sequence used to generate the unique id is made from the name of the table that uses the id by appending "_id_seq" to it.
 
Methods inherited from class edu.ucsb.nceas.dbadapter.AbstractDatabase
createObject, main, toDate
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PostgresqlAdapter

public PostgresqlAdapter()
Method Detail

getUniqueID

public long getUniqueID(java.sql.Connection conn,
                        java.lang.String tableName)
                 throws java.sql.SQLException
The PostgreSQL unique ID /sequence generator The name of the sequence used to generate the unique id is made from the name of the table that uses the id by appending "_id_seq" to it. When record is inserted in the table and insert trigger gets a nextval from that sequence, select currval of that sequence can return the generated key in the same db connection.

Specified by:
getUniqueID in class AbstractDatabase
Parameters:
conn - db connection in which the unique id was generated
tableName - the name of table which unique id was generate
Returns:
return the generated unique id as a long type
Throws:
java.sql.SQLException - any SQLException that can be thrown during the db operation

getDateTimeFunction

public java.lang.String getDateTimeFunction()
The PostgreSQL function name that gets the current date and time from the database server

Specified by:
getDateTimeFunction in class AbstractDatabase
Returns:
return the current date and time function name: "now()"

getIsNULLFunction

public java.lang.String getIsNULLFunction()
The PostgreSQL function name that is used to return non-NULL value

Specified by:
getIsNULLFunction in class AbstractDatabase
Returns:
return the non-NULL function name: "coalesce"

getStringDelimiter

public java.lang.String getStringDelimiter()
PostgreSQL's string delimiter character: single quote (')

Specified by:
getStringDelimiter in class AbstractDatabase
Returns:
return the string delimiter: single quote (')


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